It wasn’t hard to notice the sea of red enveloping the stands at the Rams’ home stadium Sunday. 49ers fans invaded and made their presence known during the team’s 27-24 overtime victory.

While it was noticeably louder on television when the 49ers made a play, injured 49ers right tackle Mike McGlinchey pointed out on Twitter that visiting fans in attendance turned the Week 18 tilt into a virtual 49ers home game.

“Rams using silent count in their home stadium,” McGlinchey tweeted early in the third quarter of Sunday’s game. “Faithful in full force!”

Multiple beat writers on site noted the noise level for positive 49ers plays as well, most notably during the 49ers’ run in the third quarter when they knotted the game at 17-17.

Rams quarterback Matthew Stafford’s postgame comments were the most telling in terms of how San Francisco’s fans impacted the game. He noted that his club, while at home, did well to communicate in the amped up stadium.

“We had a chance there at the end of the game,” Stafford said per a Rams Wire transcription. “I thought our guys did a good job communicating. It was a tough environment for us to communicate in, really, the whole second half. Our guys did a nice job and we got that lead back. Just didn’t finish it the way we can on offense and could’ve – had we gotten a first down there, the game probably would’ve been over.”

That sounds like the thing a quarterback says after going on the road to Kansas City or New Orleans. That’s not what the quarterback is supposed to say after playing at home on a day where the team clinched an NFC West championship.

While the 49ers have to continue playing well, it’ll help them swing an upset or two in the playoffs if they get support like they got Sunday.